Direct answer: A stable assembly or repacking project needs clear answers to what goes into each unit, how it is assembled, which packaging and label versions are used, and what counts as acceptable.
BOM or Kit List
List every part, accessory, instruction manual and packaging material required per finished unit. Keep SKU variants separate.
Sample, SOP or Reference Images
A physical sample is ideal, but clear steps, diagrams or reference images can also work. Confirmed steps can be organized into a work instruction for the operation.
Packaging Information
Provide dimensions, material and carton requirements for bags, boxes, gift boxes and outer cartons. If packaging is not final, sourcing support may be available by project.
Labels and Version Control
FNSKU, SKU, barcodes, carton marks, warning labels and instruction manuals should all have clear version and placement requirements.
Quality and First-Piece Confirmation
Define critical checkpoints and unacceptable conditions. A first piece can be confirmed before batch work and in-process checks.
Outbound Milestone
Provide the latest outbound date and forwarder handover requirements so receiving, assembly, packaging and OQC can be scheduled backwards.
How It Connects to Changsheng
With inputs confirmed, Changsheng can connect IQC, assembly, packaging, labeling, rework, OQC, inventory and outbound handling in one workflow.

